The test for lib.string.compare is here:
http://people.apache.org/~antonp/stdcxx05022006b/
Also there are required difference for 21.strings.cpp and 21.strings.h
files.
The change log:
2006-05-02 Anton Pevtsov
* 21.strings.h (MemberId): Added new element for compare.
(OverloadId): Added new enum elements for compare overloads.
* 21.strings.cpp (_rw_setvars): Added support for compare
overloads.
With best wishes,
Anton Pevtsov.